\begin{tabular}[b]{c|c|c}
&\begin{tikzpicture} \draw[->,very thick] (0,.5) -- (.5,0); \end{tikzpicture} & \begin{tikzpicture} \draw[->,very thick] (0,0) -- (.5,.5); \end{tikzpicture}
\\\hline
\begin{tikzpicture} \draw[->,very thick] (0,.5) -- (.5,0); \end{tikzpicture} &
\begin{tabular}[t]{ll}
\pbox{20cm}{78\% \\ $\mu$: -8\% \\ N: 11979}
&\scalebox{.25}{\input{hist/m1-s1-1.tex}}
\end{tabular}
&
\begin{tabular}[t]{ll}
\pbox{20cm}{22\% \\ $\mu$: 35\% \\ N: 3328}
&\scalebox{.25}{\input{hist/m1-s1-2.tex}}
\end{tabular}
\\\hline
\begin{tikzpicture} \draw[->,very thick] (0,0) -- (.5,.5); \end{tikzpicture} &
\begin{tabular}[t]{ll}
\pbox{20cm}{50\% \\ $\mu$: -15\% \\ N: 3327}
&\scalebox{.25}{\input{hist/m1-s2-1.tex}}
\end{tabular}
&
\begin{tabular}[t]{ll}
\pbox{20cm}{50\% \\ $\mu$: 58\% \\ N: 3277}
&\scalebox{.25}{\input{hist/m1-s2-2.tex}}
\end{tabular}
\end{tabular}
